Entropy production analysis and experimental confirmation of absorption systems

H. T. Chua, J. M. Gordon, K. C. Ng, Q. Han

    Research output: Contribution to journalArticlepeer-review

    26 Scopus citations


    Absorption chillers, heat pumps and heat transformers exploit thermal power input to satisfy a variety of refrigeration and heating applications, as well as to boost the temperature of low-grade heat. Can one arrive at accurate predictions of system performance with a simple analytic irreversible thermodynamic model? In capturing the essential physics of the problem, that model would be required to provide a predictive and diagnostic tool and to permit determination of optimal absorption system operating conditions. We derive such a model and check its validity against experimental data and computer simulation results from a variety of commercial absorption units. We reinforce the observation that commercial units appear to have evolved empirically such that maximum efficiency is realized under design conditions. The failure of a host of previously-published endo-reversible thermodynamic models to account for fundamental qualitative features and accurate predictions of system behavior is documented with computer simulation results and experimental performance data.

    Original languageEnglish
    Pages (from-to)179-190
    Number of pages12
    JournalInternational Journal of Refrigeration
    Issue number3
    StatePublished - 1 Jan 1997


    • Absorption
    • Calculation
    • Heat pump
    • Heat transformer
    • Performance
    • Refrigerating system
    • Simulation
    • Thermodynamics

    ASJC Scopus subject areas

    • Building and Construction
    • Mechanical Engineering


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